Field gun with tube recoil



April 15,1930.

V. HAMMAR FIELD GUN WITH TUBE RECOIL Filed July 12 1928 In van/0r V/cfor Ham/War by M Patented Apr. 15, 1959 VICTOR HAMMAR, 0F BOFORS, SWEDEN FIELD GUN WITH TUBE RECOIL Application filed July 12, 1928, Serial No. 292,171, and in Sweden December 4, 1926.

- The present invention relates to an arrangement in such field guns provided with tube recoil, in which the tube rests against one or more supporting-faces at the cradle. The invention is essentially characterized by the fact that one or more supporting rollers are arranged at the fore part of the cradle in such a way as to support the tube and thus prevent a hoisting of the fore part at the re .1 coil or the return motion respectively.

.the same view, the tube, however, occupying its recoil position. Fig. 3 is a section along the line IIl.-Il1 in Fig. 2. while Fig. 4 is a section along the line I v- 1V in Fig. 2.

The tube is formed by two cylinders 1 and 3 and a short intermediary, conical portion 2 and a back-piece or block provided with lugs to fix the piston rods 6 of the braking pistons. The braking pistons work in cylinders 7 which are arranged in the cradle 8. This cradle surrounds, at its front end, the front end 1 of the tube by means of four rollers 9 (Fig. 3) supported by a how 11 or the like.

The cradle is at its rear end provided with similar rollers 10 (Fig. 4) mounted to turn in a how 12 or the like, so that the tube is entirely guided by the rollers, by which fact all sliding friction between the tube and the cradle is avoided.

During the recoil and the return the tube rests against the cradle at the rear, bottom rollers 10 and the fore top rollers 9, the braking and advancing forces, acting on the rings 5. tending to hoist the front part of the tube and, against the action of the proper weight of the tube press it against the upper supporting rollers 9. The reacting force of the pressure of the tube against the supporting rollers and the tube weight are absorbed by the back, bottom rollers of the cradle.

Having now partlcularly described the nature of my invention and the manner of its operation, what I claim is:

l. Arrangement in field guns having tube recoil comprising a tube, rollers disposed radially around said tube for supporting the forward end thereof and which bear against the cylindrical periphery of the tube, and a cradle in which said rollers are mounted.

2. Arrangement in field guns having tube recoil comprising a tube; two pairs of dia metrically opposed rollers for supporting the forward end thereof, the axes of the rollers of each pair being parallel while the two pairs of rollers are disposed at right angles to each other, all the rollers bearing against the cylindrical periphery of the tube; and a cradle in which said rollers are mounted.

3. Arrangement in field guns having tube recoil comprising a tube, two sets of radially disposed rollers supporting the forward and rear ends of the tube respectively which roll ers bear against the cylindrical periphery of the tube, and cradles in which the rollers are mounted.

4. Arrangement in field guns having tube recoil comprising a tube, two sets of radially disposed rollers supporting the forward and rear ends of the tube respectively each set consisting of two pairs of diametrically opposed rollers located at right angles to each other with all the rollers bearing against the cylindrical periphery of the tube, and cradles in which the rollers are mounted.

5. Arrangement in field guns having tube recoil comprising a tube the forward end of which is of smaller diameter than the rear end, two sets of radially disposed rollers supporting the forward and rear ends of the tube respectively each set consisting of two pairs of diametrically opposed rollers located at right angles to each other with all the rollers bearing against the cylindrical periphery of the tube, and cradles in which the rollers are mounted.

VICTOR HAMMAR. 

